Answers

2015-09-20T15:37:29+05:30
Because they are to close to the bottom of the food chain.in order for the survival of the species,when they reproduce, they do so in the millions so only a few of the progeny will be bound survive sometimes.
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2015-09-20T15:53:22+05:30
Because they are to close to the bottom of the food chain.in order for the survival of the species,when they reproduce, they do so in the millions so only a few of the progeny will be bound survive sometimes.
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